From d64698ef39af7d865b9aed970fd67036a1908b68 Mon Sep 17 00:00:00 2001
From: Guillaume Horel <guillaume.horel@gmail.com>
Date: Tue, 18 Feb 2020 16:21:23 -0500
Subject: prevent segfault

---
 pyisda/credit_index.pyx | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/pyisda/credit_index.pyx b/pyisda/credit_index.pyx
index dbb9a6d..16e83dc 100644
--- a/pyisda/credit_index.pyx
+++ b/pyisda/credit_index.pyx
@@ -57,12 +57,12 @@ cdef class CurveList:
             size_t n = len(curves)
             double w
 
-        w, sc = curves[0]
-
         if value_date is not None:
             self.base_date = pydate_to_TDate(value_date)
         else:
-            self.base_date = sc._thisptr.get().fBaseDate
+            if len(curves) >= 1:
+                w, sc = curves[0]
+                self.base_date = sc._thisptr.get().fBaseDate
 
         i = 0
         cdef int n_skipped = 0
-- 
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